﻿using System;
using System.Collections.Generic;
using System.Data;
using System.Reflection;
using System.Text;

namespace DefeatEpidemic.Common
{
    public class ModelConvertHelper<T> where T : new()
    {
        public static IList<T> ConvertToModel(DataTable dt)
        {
            // 定义集合    
            IList<T> ts = new List<T>();

            // 获得此模型的类型   
            Type type = typeof(T);
            string tempName = "";
            foreach (DataRow dr in dt.Rows)
            {
                T t = new T();
                // 获得此模型的公共属性      
                PropertyInfo[] propertys = t.GetType().GetProperties();
                foreach (PropertyInfo pi in propertys)
                {
                    tempName = pi.Name;  // 检查DataTable是否包含此列
                    if (dt.Columns.Contains(tempName))
                    {
                        // 判断此属性是否有Setter      
                        if (!pi.CanWrite) continue;
                        //if (dr[tempName].ToString().Contains("/upload"))
                        //    dr[tempName] = System.Configuration.ConfigurationManager.AppSettings["weburl"] + dr[tempName].ToString();
                        object value = dr[tempName];
                        if (value != DBNull.Value)
                            pi.SetValue(t, value, null);
                    }
                }
                ts.Add(t);
            }
            return ts;
        }

        public static T DataRowToModel(DataRow row)
        {
            T model = new T();
            if (row != null)
            {
                //利用反射获得属性的所有公共属性
                //Type modelType = typeof(T);
                Type modelType = model.GetType();
                for (int i = 0; i < row.Table.Columns.Count; i++)
                {
                    //查找实体是否存在列表相同的公共属性
                    PropertyInfo proInfo = modelType.GetProperty(row.Table.Columns[i].ColumnName);
                    if (proInfo != null && row[i] != DBNull.Value)
                    {
                        proInfo.SetValue(model, row[i], null);//用索引值设置属性值
                    }
                }
            }
            return model;
        }
    }
}
